Cylinder head bolt
Land Rover: Freelander I - 1.8 Petrol (1997-2006)
MG: MGF and TF (1995-2005)
Rover: 100, 200, 400, 25, 45, 75
Lotus: Elise Series 1 (1996-2000) and Series 2 (2000-06)
These so-called stretch bolts are specifically designed to give a set length under the right torque. As such they should never be used a second time. The desired bias requires careful installation. The cylinder head bolts are assembled in several stages with a specific tightening torque. When this torque is reached, the bolts are turned further through a defined angle which pre-loads them into a plastic region. We recommend that new cylinder head stretch bolts be used and any work carried out to your engine is done in accordance with a factory workshop manual. Whilst you are doing this job we consider it advisable to replace the water pump and expansion cap to minimise any future problems.
